Add limited API server warnings

[shiosyakeyakini-info]

Summary

• fetch limited API servers using server preset provider
• warn user on login if server matches limited list
• support multiple languages
• cover new provider with tests

Testing

• flutter test

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https://chatgpt.com/codex/tasks/task_e_686246f5c9208321bb258b9604bc436f

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 37.73585% with 33 lines in your changes missing coverage. Please review.

Project coverage is 26.81%. Comparing base (ab6fe79) to head (663d273).

Files with missing lines	Patch %	Lines
lib/view/login_page/mi_auth_login.dart	0.00%	15 Missing ⚠️
lib/view/login_page/api_key_login.dart	0.00%	9 Missing ⚠️
...tate_notifier/common/server_preset_provider.g.dart	77.27%	5 Missing ⚠️
lib/l10n/app_localizations_ja.dart	0.00%	2 Missing ⚠️
lib/l10n/app_localizations_zh.dart	0.00%	2 Missing ⚠️

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Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #757      +/-   ##
===========================================
+ Coverage    26.77%   26.81%   +0.04%     
===========================================
  Files          336      336              
  Lines        19009    19054      +45     
===========================================
+ Hits          5090     5110      +20     
- Misses       13919    13944      +25     

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